The major disadvantage with blown fiber is that _____.

The major disadvantage of blown fiber is that special equipment and training are usually required. This process involves blowing fiber optic cables into pre-installed ducts, which necessitates specific tools for installation, such as air-blowing equipment that pushes the fibers through the ducts efficiently. Furthermore, technicians need specialized training to handle this equipment properly, as well as to understand the unique properties and handling characteristics of blown fiber systems.

Having this specific training and equipment can lead to increased complexity in the installation process compared to traditional fiber optics, where the installation may not require such specialized methods or skills. Though other options may present challenges in different contexts, they do not encapsulate the unique requirements and limitations introduced by the blown fiber method as effectively as the need for specialized equipment and training does.